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ELEN [110]
3 years ago
5

Which of the following is not attached to the central carbon atom in an amino acid?

Biology
1 answer:
dangina [55]3 years ago
3 0

<u>Answer:</u>

<em>An oxygen is not attached to the central carbon atom in an amino acid.</em>

<u>Explanation:</u>

To understand this, we need to look at the <em>simple molecular structure of amino acids.</em> The basic structure of amino acid consists of an amine (NH_2), a carboxyl (COOH) functional groups.

There is also a R-Group for a particular amino acid on the side chain of it. Although oxygen is one of the key constituents of amino acid it is not directly attached with the <em>central carbon atom in an amino acid.</em>

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Question 3 (1 point)
Mumz [18]

Answer:

False

Explanation:

Mass of Particle: Heavier particles will move more slowly and so will have a slower rate of diffusion. Smaller particles on the other hand will diffuse faster because they can move faster.

4 0
3 years ago
Which statement accurately describes tectonic plate movement? Tectonic plate movement can be prevented with planning. Tectonic p
ira [324]

Answer:

The correct answer is Tectonic plate movement is a long-term environmental change.

Explanation:

When tectonic plates in the earth started to move, this process helped the planet to evolve and to shape the continents as exist today.

Different investigation teams have discovered that plates move approximately 2.5 centimeters per year. This movement is the key to the evolution of life and the development of the planet. This slow process involves mountain formation, rocks exposure, and chemical reactions that could stabilize the temperature on the earth´s surface for millions of years. And this stable weather is essential for the evolution of life. Plates movement carries carbon inside and outside of the planet, regulating the amount of carbon dioxide in the atmosphere (greenhouse effect). In this way, it can regulate the temperature. This regulation influence in precipitations,  chemical reactions that involve carbon release and minerals such as calcium, the water flow, volcanic eruptions, among other events. Plates tectonic is also responsible for life, as weathering and mineralization of the rocks release elements and nutrients that are necessary for the life of different organisms.    

So, up to this point, we can say that tectonic plates movement can not be prevented with planning, it does cause environmental change by regulating temperature, and hence it affects organisms.

There are short term effects and long term effects provoked by tectonic plates movement. Earthquakes are examples of short term effects, while mountain formation, ocean formation and, clime regulation are examples of long term changes.

Plates tectonic movement is a very slow process, that might last many years. The Andes formation, for example, started approximately 200 years ago, and these mountains are still rising. The subduction process has not finished as the plates are still moving.  

5 0
3 years ago
Read 2 more answers
The image below shows three different types of cells. <br><br> Which correctly identifies each cell?
blsea [12.9K]

Answer:

B.

Explanation:

Cell A has a cell wall, Cell B has no cell wall, and Cell C has a fungal cell wall.

7 0
2 years ago
Why was the introduction of the Chinese Chestnut tree harmful to native<br> species?
sveta [45]

Answer:

Cryphonectria parasitica is a parasitic fungus of chestnut trees.

Explanation:

this was caused from a great disease  that overran the country

5 0
3 years ago
Sheila conducts an investigation to see how the amount of salt dissolved in water affects the density of the water. Which statem
lakkis [162]
The correct answer would be the third option. The correct plan for the experiment would be that the type of salt and the amount of water are controls, and the amount of salt and the density are variables. Sheila wants to know the affect of varying the amount of salt to the density so it is the density and the amount of salt that is being changed while the type of salt and the water are kept constant since they are not being investigated.
8 0
4 years ago
Read 2 more answers
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